The metal that does not displace hydrogen from an acid is:

1. Hg

2. Zn

3. Al

4. Ca

Subtopic:  Preparation & Properties |
 71%
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The catalyst used in Bosch process of manufacture of H2 is:

1. finely divided Ni

2. V2O5

3. Pd

4. Fe2O3 + Cr2O3

Subtopic:  Preparation & Properties |
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An aqueous solution of hydrogen peroxide is:

1. alkaline

2. neutral

3. strongly acidic

4. weakly acidic

Subtopic:  H2O2 (Hydrogen Peroxide) |
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The correct statement among the following regarding perhydrol is -

1. It is 30% H2O2 or 100 vol. H2O2

2. Its molarity is 8.8 M

3. It is used as an antiseptic and a germicide

4. All of the above

Subtopic:  H2O2 (Hydrogen Peroxide) |
 82%
From NCERT
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The ortho and para hydrogen possess:

1. same physical properties but different chemical properties

2. different physical properties but same chemical properties

3. same chemical and physical properties

4. different physical and chemical properties

Subtopic:  Hydrogen- Types & Isotopes |
 54%
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On bubbling CO2 through a solution of barium peroxide in water:

1. O2 is formed

2. H2CO3 is formed

3. H2O2 is formed

4. H2 is formed

Subtopic:  H2O2 (Hydrogen Peroxide) |
 75%
From NCERT
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A mixture of hydrazine and 60 to 90 percent of H2O2 solution is:

1. antiseptic

2. rocket fuel

3. germicide

4. insecticide

Subtopic:  H2O2 (Hydrogen Peroxide) |
 51%
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Temporary hardness is caused due to the presence of:

1. CaSO4

2. CaCl2

3. CaCO3

4. Ca(HCO3)2

Subtopic:  Hard & Soft Water |
 78%
From NCERT
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H2O2 is prepared in the laboratory by the reaction of :

1. MnO2 with dilute cold H2SO4

2. BaO2 and  CO2 bubbling through cold water

3. PbO2 with an acidified solution of KMnO4

4. Na2O2 with boiling water

Subtopic:  H2O2 (Hydrogen Peroxide) |
 74%
From NCERT
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A 1000 g aqueous solution of CaCO3 contains 10 g of calcium carbonate. The hardness of the solution is:

1. 10 ppm

2. 100 pm

3. 1000 ppm

4. 10000 ppm

Subtopic:  Hard & Soft Water |
 55%
From NCERT
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